phase G: data minimisation + passwordless auth + DeepSeek-first LLM

Server no longer holds portfolios. Holdings live in the browser
(localStorage); the server publishes an anonymous ticker_universe and a
gzipped /api/universe payload identical for every authenticated user, so
access patterns can't betray which tickers a user holds. AI commentary
is generated ephemerally from the browser-supplied pie and the cost
ledger row records no positions. Migrations 0009-0011 added the
universe table and dropped positions / portfolio_snapshots /
portfolios.

Authentication is now e-mail OTP only. Migration 0010 dropped
password_hash and email_verified (every active session is by
construction proof of email control). The /signup endpoint is gone;
signup and login share a single email-entry page. Email rendering is
HTML+plain-text multipart with a shared brand palette (app/branding.py)
asserted in sync with the CSS by a drift-detection test.

LLM provider defaults to DeepSeek-direct (cheaper, api.deepseek.com)
with OpenRouter as automatic fallback if DeepSeek fails. ai_log_job and
indicator_summary_job now iterate the two tones (NOVICE, INTERMEDIATE)
per cycle so the dashboard's tone toggle is instant; PROMPT_VERSION
bumped to 6 with an educational anti-TA / anti-gambling stance baked
into _CORE. NOVICE mode renders a curated glossary inline (CBOE VIX,
yield curve, HY OAS, etc.) with JS-positioned tooltips that survive
viewport edges and sticky bars. Model name and tokens hidden from the
user UI; still recorded in StrategicLog.model and AICall for admin.

Layout adds a sticky top nav, a sticky bottom markets bar (one chip per
exchange with status LED + headline index + 1d change), and
Phase H feedback reporting is queued in tasks/todo.md.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

app/schemas.py

@@ -50,24 +50,5 @@ class StrategicLogOut(BaseModel):
     completion_tokens: int | None
 
 
-class PositionOut(BaseModel):
-    ticker: str
-    name: str | None
-    quantity: float | None
-    average_price: float | None
-    current_price: float | None
-    ppl: float | None
-    ppl_pct: float | None = None  # (current-avg)/avg * 100 — currency-neutral
-
-
-class PortfolioSummary(BaseModel):
-    name: str
-    snapshot_at: datetime | None
-    currency: str
-    total_value: float | None
-    cash: float | None
-    invested: float | None
-    total_cost: float | None = None
-    unrealized_ppl: float | None = None
-    realized_ppl: float | None = None
-    positions: list[PositionOut] = []
+# PositionOut / PortfolioSummary removed in Phase G — the server no
+# longer holds positions; the browser computes P/L from /api/universe.